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Use EndPoint to send local/remote command, and hide agentMgr message

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passing.
This commit is contained in:
Min Chen 2013-04-22 11:57:28 -07:00
parent ffdf567b58
commit 9c584b5500
15 changed files with 67 additions and 102 deletions
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3
engine/api/src/org/apache/cloudstack/engine/subsystem/api/storage/EndPointSelector.java
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@ -29,6 +29,9 @@ public interface EndPointSelector {
* @return
*/
EndPoint select(DataObject object);
EndPoint select(DataStore store);
/**
* @param store
* @return

24
engine/storage/image/src/org/apache/cloudstack/storage/image/TemplateServiceImpl.java
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@ -34,6 +34,8 @@ import org.apache.cloudstack.engine.subsystem.api.storage.DataMotionService;
import org.apache.cloudstack.engine.subsystem.api.storage.DataObject;
import org.apache.cloudstack.engine.subsystem.api.storage.DataStore;
import org.apache.cloudstack.engine.subsystem.api.storage.DataStoreManager;
import org.apache.cloudstack.engine.subsystem.api.storage.EndPoint;
import org.apache.cloudstack.engine.subsystem.api.storage.EndPointSelector;
import org.apache.cloudstack.engine.subsystem.api.storage.ObjectInDataStoreStateMachine;
import org.apache.cloudstack.engine.subsystem.api.storage.ObjectInDataStoreStateMachine.Event;
import org.apache.cloudstack.engine.subsystem.api.storage.SnapshotInfo;
@ -58,14 +60,12 @@ import org.springframework.stereotype.Component;
import com.cloud.agent.AgentManager;
import com.cloud.agent.api.Answer;
import com.cloud.agent.api.storage.DeleteTemplateCommand;
import com.cloud.agent.api.storage.ListTemplateAnswer;
import com.cloud.agent.api.storage.ListTemplateCommand;
import com.cloud.alert.AlertManager;
import com.cloud.dc.DataCenterVO;
import com.cloud.dc.dao.ClusterDao;
import com.cloud.dc.dao.DataCenterDao;
import com.cloud.exception.AgentUnavailableException;
import com.cloud.exception.ResourceAllocationException;
import com.cloud.hypervisor.Hypervisor.HypervisorType;
import com.cloud.storage.StoragePool;
@ -129,6 +129,8 @@ public class TemplateServiceImpl implements TemplateService {
@Inject
TemplateDataFactory _templateFactory;
@Inject VMTemplatePoolDao _tmpltPoolDao;
@Inject
EndPointSelector _epSelector;
class TemplateOpContext<T> extends AsyncRpcConext<T> {
final TemplateObject template;
@ -179,7 +181,7 @@ public class TemplateServiceImpl implements TemplateService {
}
}
}
@Override
public void handleSysTemplateDownload(HypervisorType hostHyper, Long dcId) {
Set<VMTemplateVO> toBeDownloaded = new HashSet<VMTemplateVO>();
@ -377,17 +379,8 @@ public class TemplateServiceImpl implements TemplateService {
List<UserVmVO> userVmUsingIso = _userVmDao.listByIsoId(tInfo.getId());
//check if there is any Vm using this ISO.
if (userVmUsingIso == null || userVmUsingIso.isEmpty()) {
VMTemplateVO template = _templateDao.findById(tInfo.getId());
DeleteTemplateCommand dtCommand = new DeleteTemplateCommand(store.getTO(), store.getUri(), tInfo.getInstallPath(), template.getId(), template.getAccountId());
try {
_agentMgr.sendToSecStorage(store, dtCommand, null);
} catch (AgentUnavailableException e) {
String err = "Failed to delete " + tInfo.getTemplateName() + " on secondary storage " + storeId + " which isn't in the database";
s_logger.error(err);
return;
}
String description = "Deleted template " + tInfo.getTemplateName() + " on secondary storage " + storeId + " since it isn't in the database";
deleteTemplateAsync(_templateFactory.getTemplate(tInfo.getId(), store));
String description = "Deleted template " + tInfo.getTemplateName() + " on secondary storage " + storeId;
s_logger.info(description);
}
}
@ -423,7 +416,8 @@ public class TemplateServiceImpl implements TemplateService {
private Map<String, TemplateProp> listTemplate(DataStore ssStore) {
ListTemplateCommand cmd = new ListTemplateCommand(ssStore.getUri());
Answer answer = _agentMgr.sendToSecStorage(ssStore, cmd);
EndPoint ep = _epSelector.select(ssStore);
Answer answer = ep.sendMessage(cmd);
if (answer != null && answer.getResult()) {
ListTemplateAnswer tanswer = (ListTemplateAnswer)answer;
return tanswer.getTemplateInfo();

7
engine/storage/src/org/apache/cloudstack/storage/endpoint/DefaultEndPointSelector.java
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@ -210,6 +210,12 @@ public class DefaultEndPointSelector implements EndPointSelector {
@Override
public EndPoint select(DataObject object) {
DataStore store = object.getDataStore();
return select(store);
}
@Override
public EndPoint select(DataStore store) {
if (store.getRole() == DataStoreRole.Primary) {
return findEndpointForPrimaryStorage(store);
} else if (store.getRole() == DataStoreRole.Image) {
@ -219,7 +225,6 @@ public class DefaultEndPointSelector implements EndPointSelector {
}else {
throw new CloudRuntimeException("not implemented yet");
}
}
@Override

22
engine/storage/volume/src/org/apache/cloudstack/storage/volume/VolumeServiceImpl.java
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@ -32,6 +32,8 @@ import org.apache.cloudstack.engine.subsystem.api.storage.CreateCmdResult;
import org.apache.cloudstack.engine.subsystem.api.storage.DataMotionService;
import org.apache.cloudstack.engine.subsystem.api.storage.DataObject;
import org.apache.cloudstack.engine.subsystem.api.storage.DataStore;
import org.apache.cloudstack.engine.subsystem.api.storage.EndPoint;
import org.apache.cloudstack.engine.subsystem.api.storage.EndPointSelector;
import org.apache.cloudstack.engine.subsystem.api.storage.ObjectInDataStoreStateMachine.Event;
import org.apache.cloudstack.engine.subsystem.api.storage.SnapshotInfo;
import org.apache.cloudstack.engine.subsystem.api.storage.TemplateInfo;
@ -53,14 +55,12 @@ import org.springframework.stereotype.Component;
import com.cloud.agent.AgentManager;
import com.cloud.agent.api.Answer;
import com.cloud.agent.api.storage.DeleteVolumeCommand;
import com.cloud.agent.api.storage.ListVolumeAnswer;
import com.cloud.agent.api.storage.ListVolumeCommand;
import com.cloud.alert.AlertManager;
import com.cloud.configuration.Config;
import com.cloud.configuration.Resource.ResourceType;
import com.cloud.configuration.dao.ConfigurationDao;
import com.cloud.exception.AgentUnavailableException;
import com.cloud.exception.ConcurrentOperationException;
import com.cloud.exception.ResourceAllocationException;
import com.cloud.storage.StoragePool;
@ -119,6 +119,8 @@ public class VolumeServiceImpl implements VolumeService {
VolumeDataStoreDao _volumeStoreDao;
@Inject
VolumeDao _volumeDao;
@Inject
EndPointSelector _epSelector;
public VolumeServiceImpl() {
}
@ -659,7 +661,7 @@ public class VolumeServiceImpl implements VolumeService {
} else {
vo.stateTransit(Volume.Event.OperationSucceeded);
}*/
_resourceLimitMgr.incrementResourceCount(vo.getAccountId(), ResourceType.secondary_storage,
vo.getSize());
VolumeApiResult res = new VolumeApiResult(vo);
@ -815,16 +817,9 @@ public class VolumeServiceImpl implements VolumeService {
//Delete volumes which are not present on DB.
for (Long uniqueName : volumeInfos.keySet()) {
TemplateProp vInfo = volumeInfos.get(uniqueName);
DeleteVolumeCommand dtCommand = new DeleteVolumeCommand(store.getUri(), vInfo.getInstallPath());
try {
_agentMgr.sendToSecStorage(store, dtCommand, null);
} catch (AgentUnavailableException e) {
String err = "Failed to delete " + vInfo.getTemplateName() + " on image store " + storeId + " which isn't in the database";
s_logger.error(err);
return;
}
this.expungeVolumeAsync(this.volFactory.getVolume(vInfo.getId(), store));
String description = "Deleted volume " + vInfo.getTemplateName() + " on image store " + storeId + " since it isn't in the database";
String description = "Deleted volume " + vInfo.getTemplateName() + " on image store " + storeId;
s_logger.info(description);
}
@ -832,7 +827,8 @@ public class VolumeServiceImpl implements VolumeService {
private Map<Long, TemplateProp> listVolume(DataStore store) {
ListVolumeCommand cmd = new ListVolumeCommand(store.getUri());
Answer answer = _agentMgr.sendToSecStorage(store, cmd);
EndPoint ep = _epSelector.select(store);
Answer answer = ep.sendMessage(cmd);
if (answer != null && answer.getResult()) {
ListVolumeAnswer tanswer = (ListVolumeAnswer)answer;
return tanswer.getTemplateInfo();

6
plugins/storage/image/default/src/org/apache/cloudstack/storage/datastore/driver/CloudStackImageStoreDriverImpl.java
View File

@ -32,6 +32,7 @@ import org.apache.cloudstack.engine.subsystem.api.storage.DataObjectType;
import org.apache.cloudstack.engine.subsystem.api.storage.DataStore;
import org.apache.cloudstack.engine.subsystem.api.storage.DataTO;
import org.apache.cloudstack.engine.subsystem.api.storage.EndPoint;
import org.apache.cloudstack.engine.subsystem.api.storage.EndPointSelector;
import org.apache.cloudstack.engine.subsystem.api.storage.VolumeInfo;
import org.apache.cloudstack.framework.async.AsyncCallbackDispatcher;
import org.apache.cloudstack.framework.async.AsyncCompletionCallback;
@ -115,6 +116,7 @@ public class CloudStackImageStoreDriverImpl implements ImageStoreDriver {
@Inject
private AgentManager _agentMgr;
@Inject TemplateDataStoreDao _templateStoreDao;
@Inject EndPointSelector _epSelector;
@Override
@ -295,7 +297,9 @@ public class CloudStackImageStoreDriverImpl implements ImageStoreDriver {
TemplateDataStoreVO tmplStore = _templateStoreDao.findByStoreTemplate(storeId, templateId);
String installPath = tmplStore.getInstallPath();
if (installPath != null) {
Answer answer = _agentMgr.sendToSecStorage(store, new DeleteTemplateCommand(store.getTO(), store.getUri(), installPath, template.getId(), template.getAccountId()));
DeleteTemplateCommand cmd = new DeleteTemplateCommand(store.getTO(), store.getUri(), installPath, template.getId(), template.getAccountId());
EndPoint ep = _epSelector.select(templateObj);
Answer answer = ep.sendMessage(cmd);
if (answer == null || !answer.getResult()) {
s_logger.debug("Failed to deleted template at store: " + store.getName());

6
plugins/storage/image/s3/src/org/apache/cloudstack/storage/datastore/driver/S3ImageStoreDriverImpl.java
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@ -33,6 +33,7 @@ import org.apache.cloudstack.engine.subsystem.api.storage.DataObjectType;
import org.apache.cloudstack.engine.subsystem.api.storage.DataStore;
import org.apache.cloudstack.engine.subsystem.api.storage.DataTO;
import org.apache.cloudstack.engine.subsystem.api.storage.EndPoint;
import org.apache.cloudstack.engine.subsystem.api.storage.EndPointSelector;
import org.apache.cloudstack.framework.async.AsyncCompletionCallback;
import org.apache.cloudstack.framework.async.AsyncRpcConext;
import org.apache.cloudstack.storage.datastore.db.ImageStoreDetailsDao;
@ -110,6 +111,7 @@ public class S3ImageStoreDriverImpl implements ImageStoreDriver {
@Inject
private AgentManager _agentMgr;
@Inject TemplateDataStoreDao _templateStoreDao;
@Inject EndPointSelector _epSelector;
@Override
public String grantAccess(DataObject data, EndPoint ep) {
@ -243,7 +245,9 @@ public class S3ImageStoreDriverImpl implements ImageStoreDriver {
TemplateDataStoreVO tmplStore = _templateStoreDao.findByStoreTemplate(storeId, templateId);
String installPath = tmplStore.getInstallPath();
if (installPath != null) {
Answer answer = _agentMgr.sendToSecStorage(store, new DeleteTemplateCommand(store.getTO(), store.getUri(), installPath, template.getId(), template.getAccountId()));
DeleteTemplateCommand cmd = new DeleteTemplateCommand(store.getTO(), store.getUri(), installPath, template.getId(), template.getAccountId());
EndPoint ep = _epSelector.select(templateObj);
Answer answer = ep.sendMessage(cmd);
if (answer == null || !answer.getResult()) {
s_logger.debug("Failed to deleted template at store: " + store.getName());

6
plugins/storage/image/swift/src/org/apache/cloudstack/storage/datastore/driver/SwiftImageStoreDriverImpl.java
View File

@ -33,6 +33,7 @@ import org.apache.cloudstack.engine.subsystem.api.storage.DataObjectType;
import org.apache.cloudstack.engine.subsystem.api.storage.DataStore;
import org.apache.cloudstack.engine.subsystem.api.storage.DataTO;
import org.apache.cloudstack.engine.subsystem.api.storage.EndPoint;
import org.apache.cloudstack.engine.subsystem.api.storage.EndPointSelector;
import org.apache.cloudstack.framework.async.AsyncCompletionCallback;
import org.apache.cloudstack.framework.async.AsyncRpcConext;
import org.apache.cloudstack.storage.datastore.db.ImageStoreDetailsDao;
@ -110,6 +111,7 @@ public class SwiftImageStoreDriverImpl implements ImageStoreDriver {
@Inject
private AgentManager _agentMgr;
@Inject TemplateDataStoreDao _templateStoreDao;
@Inject EndPointSelector _epSelector;
@Override
public String grantAccess(DataObject data, EndPoint ep) {
@ -236,7 +238,9 @@ public class SwiftImageStoreDriverImpl implements ImageStoreDriver {
TemplateDataStoreVO tmplStore = _templateStoreDao.findByStoreTemplate(storeId, templateId);
String installPath = tmplStore.getInstallPath();
if (installPath != null) {
Answer answer = _agentMgr.sendToSecStorage(store, new DeleteTemplateCommand(store.getTO(), store.getUri(), installPath, template.getId(), template.getAccountId()));
DeleteTemplateCommand cmd = new DeleteTemplateCommand(store.getTO(), store.getUri(), installPath, template.getId(), template.getAccountId());
EndPoint ep = _epSelector.select(templateObj);
Answer answer = ep.sendMessage(cmd);
if (answer == null || !answer.getResult()) {
s_logger.debug("Failed to deleted template at store: " + store.getName());

3
server/src/com/cloud/agent/AgentManager.java
View File

@ -141,9 +141,6 @@ public interface AgentManager extends Manager {
Answer sendToSecStorage(HostVO ssHost, Command cmd);
void sendToSecStorage(DataStore ssStore, Command cmd, Listener listener) throws AgentUnavailableException;
Answer sendToSecStorage(DataStore ssStore, Command cmd);
/* working as a lock while agent is being loaded */
public boolean tapLoadingAgents(Long hostId, TapAgentsAction action);

17
server/src/com/cloud/agent/manager/AgentManagerImpl.java
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@ -39,11 +39,8 @@ import javax.ejb.Local;
import javax.inject.Inject;
import javax.naming.ConfigurationException;
import org.apache.cloudstack.engine.subsystem.api.storage.DataStore;
import org.apache.cloudstack.storage.datastore.db.PrimaryDataStoreDao;
import org.apache.log4j.Logger;
import org.springframework.stereotype.Component;
import com.cloud.agent.AgentManager;
import com.cloud.agent.Listener;
import com.cloud.agent.StartupCommandProcessor;
@ -99,7 +96,6 @@ import com.cloud.resource.Discoverer;
import com.cloud.resource.ResourceManager;
import com.cloud.resource.ResourceState;
import com.cloud.resource.ServerResource;
import com.cloud.server.ManagementService;
import com.cloud.storage.StorageManager;
import com.cloud.storage.StorageService;
import com.cloud.storage.dao.StoragePoolHostDao;
@ -110,7 +106,6 @@ import com.cloud.user.AccountManager;
import com.cloud.utils.ActionDelegate;
import com.cloud.utils.NumbersUtil;
import com.cloud.utils.Pair;
import com.cloud.utils.component.Manager;
import com.cloud.utils.component.ManagerBase;
import com.cloud.utils.concurrency.NamedThreadFactory;
import com.cloud.utils.db.DB;
@ -381,17 +376,6 @@ public class AgentManagerImpl extends ManagerBase implements AgentManager, Handl
return attache;
}
@Override
public Answer sendToSecStorage(DataStore ssStore, Command cmd) {
HostVO ssAhost = _ssvmMgr.pickSsvmHost(ssStore);
return easySend(ssAhost.getId(), cmd);
}
@Override
public void sendToSecStorage(DataStore ssStore, Command cmd, Listener listener) throws AgentUnavailableException {
HostVO ssAhost = _ssvmMgr.pickSsvmHost(ssStore);
send(ssAhost.getId(), new Commands(cmd), listener);
}
@Override
public Answer sendToSecStorage(HostVO ssHost, Command cmd) {
@ -1496,6 +1480,7 @@ public class AgentManagerImpl extends ManagerBase implements AgentManager, Handl
}
}
@Override
public void disconnectWithInvestigation(final long hostId, final Status.Event event) {
disconnectInternal(hostId, event, true);
}

24
server/src/com/cloud/storage/StorageManagerImpl.java
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@ -53,6 +53,8 @@ import org.apache.cloudstack.engine.subsystem.api.storage.DataStoreLifeCycle;
import org.apache.cloudstack.engine.subsystem.api.storage.DataStoreManager;
import org.apache.cloudstack.engine.subsystem.api.storage.DataStoreProvider;
import org.apache.cloudstack.engine.subsystem.api.storage.DataStoreProviderManager;
import org.apache.cloudstack.engine.subsystem.api.storage.EndPoint;
import org.apache.cloudstack.engine.subsystem.api.storage.EndPointSelector;
import org.apache.cloudstack.engine.subsystem.api.storage.HostScope;
import org.apache.cloudstack.engine.subsystem.api.storage.HypervisorHostListener;
import org.apache.cloudstack.engine.subsystem.api.storage.TemplateDataFactory;
@ -328,6 +330,7 @@ public class StorageManagerImpl extends ManagerBase implements StorageManager, C
DataStoreProviderManager _dataStoreProviderMgr;
@Inject
private TemplateService _imageSrv;
@Inject EndPointSelector _epSelector;
protected List<StoragePoolAllocator> _storagePoolAllocators;
public List<StoragePoolAllocator> getStoragePoolAllocators() {
@ -1270,17 +1273,16 @@ public class StorageManagerImpl extends ManagerBase implements StorageManager, C
.getInstallPath();
if (installPath != null) {
Answer answer = _agentMgr.sendToSecStorage(store,
new DeleteTemplateCommand(
store.getTO(),
store.getUri(),
destroyedTemplateStoreVO
.getInstallPath(),
destroyedTemplate.getId(),
destroyedTemplate.getAccountId()
));
EndPoint ep = _epSelector.select(store);
Command cmd = new DeleteTemplateCommand(
store.getTO(),
store.getUri(),
destroyedTemplateStoreVO
.getInstallPath(),
destroyedTemplate.getId(),
destroyedTemplate.getAccountId()
);
Answer answer = ep.sendMessage(cmd);
if (answer == null || !answer.getResult()) {
s_logger.debug("Failed to delete "

8
server/src/com/cloud/storage/download/DownloadListener.java
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@ -152,7 +152,7 @@ public class DownloadListener implements Listener {
DownloadAnswer answer = new DownloadAnswer("", Status.NOT_DOWNLOADED);
callback(answer);
}
public AsyncCompletionCallback<DownloadAnswer> getCallback() {
return this._callback;
}
@ -201,7 +201,7 @@ public class DownloadListener implements Listener {
}
public void logDisconnect() {
s_logger.warn("Unable to monitor download progress of " + this.object.getType() + ": " +
s_logger.warn("Unable to monitor download progress of " + this.object.getType() + ": " +
this.object.getId() + " at host " + _ssAgent.getId());
}
@ -260,7 +260,7 @@ public class DownloadListener implements Listener {
public void callback(DownloadAnswer answer) {
this._callback.complete(answer);
}
@Override
public boolean processCommands(long agentId, long seq, Command[] req) {
return false;
@ -287,7 +287,7 @@ public class DownloadListener implements Listener {
}
_imageSrv.handleSysTemplateDownload(hostHyper, agent.getDataCenterId());
}
/* This can be removed since
/* This can be removed
else if ( cmd instanceof StartupStorageCommand) {
StartupStorageCommand storage = (StartupStorageCommand)cmd;
if( storage.getResourceType() == Storage.StorageResourceType.SECONDARY_STORAGE ||

20
server/src/com/cloud/storage/secondary/SecondaryStorageManagerImpl.java
View File

@ -1473,26 +1473,6 @@ public class SecondaryStorageManagerImpl extends ManagerBase implements Secondar
}
@Override
public HostVO pickSsvmHost(DataStore store) {
if ( store.getRole() == DataStoreRole.Image){
Long dcId = null;
Scope storeScope = store.getScope();
if ( storeScope.getScopeType() == ScopeType.ZONE ){
dcId = storeScope.getScopeId();
}
// find ssvm that can be used to download data to store. For zone-wide image store, use SSVM for that zone. For region-wide store,
// we can arbitrarily pick one ssvm to do that task
List<HostVO> ssAHosts = listUpAndConnectingSecondaryStorageVmHost(dcId);
if (ssAHosts == null || ssAHosts.isEmpty() ) {
return null;
}
Collections.shuffle(ssAHosts);
return ssAHosts.get(0);
}
return null;
}
@Override
public boolean plugNic(Network network, NicTO nic, VirtualMachineTO vm,
ReservationContext context, DeployDestination dest) throws ConcurrentOperationException, ResourceUnavailableException,

1
server/src/com/cloud/storage/secondary/SecondaryStorageVmManager.java
View File

@ -55,5 +55,4 @@ public interface SecondaryStorageVmManager extends Manager {
public List<HostVO> listAllTypesSecondaryStorageHostsInOneZone(long dataCenterId);
public List<HostVO> listUpAndConnectingSecondaryStorageVmHost(Long dcId);
public HostVO pickSsvmHost(HostVO ssHost);
public HostVO pickSsvmHost(DataStore store);
}

10
server/src/com/cloud/template/TemplateManagerImpl.java
View File

@ -59,6 +59,8 @@ import org.apache.cloudstack.api.command.user.template.UpdateTemplatePermissions
import org.apache.cloudstack.engine.subsystem.api.storage.CommandResult;
import org.apache.cloudstack.engine.subsystem.api.storage.DataStore;
import org.apache.cloudstack.engine.subsystem.api.storage.DataStoreManager;
import org.apache.cloudstack.engine.subsystem.api.storage.EndPoint;
import org.apache.cloudstack.engine.subsystem.api.storage.EndPointSelector;
import org.apache.cloudstack.engine.subsystem.api.storage.TemplateDataFactory;
import org.apache.cloudstack.engine.subsystem.api.storage.TemplateService;
import org.apache.cloudstack.engine.subsystem.api.storage.SnapshotDataFactory;
@ -266,6 +268,7 @@ public class TemplateManagerImpl extends ManagerBase implements TemplateManager,
@Inject VolumeManager volumeMgr;
@Inject VMTemplateHostDao templateHostDao;
@Inject ImageStoreDao _imageStoreDao;
@Inject EndPointSelector _epSelector;
int _primaryStorageDownloadWait;
@ -807,9 +810,10 @@ public class TemplateManagerImpl extends ManagerBase implements TemplateManager,
public String getChecksum(DataStore store, String templatePath) {
String secUrl = store.getUri();
Answer answer;
answer = _agentMgr.sendToSecStorage(store, new ComputeChecksumCommand(
secUrl, templatePath));
EndPoint ep = _epSelector.select(store);
ComputeChecksumCommand cmd = new ComputeChecksumCommand(
secUrl, templatePath);
Answer answer = ep.sendMessage(cmd);
if (answer != null && answer.getResult()) {
return answer.getDetails();
}

12
server/test/com/cloud/agent/MockAgentManagerImpl.java
View File

@ -142,18 +142,6 @@ public class MockAgentManagerImpl extends ManagerBase implements AgentManager {
}
@Override
public void sendToSecStorage(DataStore ssStore, Command cmd, Listener listener) throws AgentUnavailableException {
// TODO Auto-generated method stub
}
@Override
public Answer sendToSecStorage(DataStore ssStore, Command cmd) {
// TODO Auto-generated method stub
return null;
}
@Override
public boolean tapLoadingAgents(Long hostId, TapAgentsAction action) {
// TODO Auto-generated method stub